package com.codingxyz.simple.lock;

import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

public class SemaphoreDemo {

    public static void main(String[] args) {

        Semaphore semaphore = new Semaphore(3);

        for (int i = 1; i <=6 ; i++) {

            new Thread(()->{
                try {
                    semaphore.acquire();
                    System.out.println(Thread.currentThread().getName() +" \t 抢到车位 ");
                    TimeUnit.SECONDS.sleep(3);
                    System.out.println(Thread.currentThread().getName()+"\t 停车3s后离开车位");
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }finally {
                    semaphore.release();
                }

            },String.valueOf(i)).start();
        }
    }
}
